{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.814","julian_year":2026.814,"time":"2026-10-25T09:26:03.762Z","years_from_j2000":26.814,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued position is carried along the great circle the object's own published motion puts it on, at a constant velocity, from the epoch that position was measured at, and the result is referred to the true equator and equinox of this instant. Those are separate things: the motion moves the object, and the rotation turns the grid under it by about fifty arcseconds a year, with nutation adding up to another seventeen.","excluded":"Parallax, the radial-velocity perspective term, aberration and refraction; each is below the accuracy of the catalogued positions themselves. An object with no published proper motion comes back where the catalogue has it rather than at a fabricated zero, and says so with a null pm_ra_mas_yr. The motion runs from position_epoch_jyear where the upstream publishes one — a timed pulsar's position belongs to the year it was timed — and from J2000 where it does not. A body with no fixed position is not propagated at all — its place comes from an ephemeris, which is what /api/v1/visible answers with."},"slug":"ngc-5543","name":"NGC 5543","class":"spiral_galaxy_sab","category":"galaxy","object_type":"Spiral galaxy Sab","mag":15.18,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":352582357.89893425,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":214.51695833333335,"dec_deg":7.654861111111112,"epoch_ra_deg":214.851354,"epoch_dec_deg":7.530152,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"position_epoch_jyear":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Boötes","discovered":"1865","featured":false,"url":"https://spacecatalog.org/object/ngc-5543","source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0","attribution":"OpenNGC, Mattia Verga (github.com/mattiaverga/OpenNGC). Fields derived from it stay under CC BY-SA 4.0.","commercial_use":"allowed"},"radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.18,"h_mag":11.29,"j_mag":11.98,"k_mag":10.93,"redshift":0.023943,"hubble_type":"Sab","wikidata_id":"Q1120906","redshift_cmb":0.02477688224092045,"discovered_by":"Heinrich Louis d'Arrest","ngc_type_code":"G","uncertainties":{"distance_ly":[20113088.169582274,20113088.169582274]},"major_axis_arcmin":0.79,"minor_axis_arcmin":0.42,"position_angle_deg":140,"surface_brightness":23.11,"radial_velocity_km_s":7092},"designations":[{"catalog":"2MASX","designation":"2MASX J14180403+0739174"},{"catalog":"LEDA","designation":"LEDA 51079"},{"catalog":"NGC","designation":"NGC 5543"},{"catalog":"PGC","designation":"PGC 51079"},{"catalog":"SDSS","designation":"SDSS J141804.07+073917.4"},{"catalog":"SDSS","designation":"SDSS J141804.07+073917.5"}],"updated_at":"2026-10-01T09:42:28.932Z","citation":{"plain":"SpaceCatalog. NGC 5543 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc-5543","bibtex":"@misc{spacecatalog_ngc-5543,\n  author       = {{SpaceCatalog}},\n  title        = {{NGC 5543}},\n  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},\n  year         = {2026},\n  url          = {https://spacecatalog.org/object/ngc-5543},\n  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from OpenNGC.}\n}","url":"https://spacecatalog.org/object/ngc-5543","release":"DR1","doi":null},"references":[],"attribution":"Data from SpaceCatalog.org. Each record names its upstream in `source`, with that producer's terms in `source.license`, the acknowledgement it asks for in `source.attribution`, and whether its terms allow commercial use in `source.commercial_use`; those terms govern the record, and citing SpaceCatalog does not discharge them."}